package cn.chenfyuan.demoapplication.config;

import cn.chenfyuan.demoapplication.entity.SysUser;
import cn.chenfyuan.demoapplication.service.PermissionService;
import cn.chenfyuan.demoapplication.service.RoleService;
import cn.chenfyuan.demoapplication.service.SysUserService;
import org.apache.shiro.authc.AuthenticationException;
import org.apache.shiro.authc.AuthenticationInfo;
import org.apache.shiro.authc.AuthenticationToken;
import org.apache.shiro.authc.SimpleAuthenticationInfo;
import org.apache.shiro.authz.AuthorizationInfo;
import org.apache.shiro.authz.SimpleAuthorizationInfo;
import org.apache.shiro.realm.AuthorizingRealm;
import org.apache.shiro.subject.PrincipalCollection;
import org.springframework.beans.factory.annotation.Autowired;

/**
 * 配置AuthorizingRealm接口用户用户认证
 * linweijian
 */
public class ShiroRealm extends AuthorizingRealm {

    @Autowired
    private SysUserService userService;
    @Autowired
    private PermissionService permissionService;
    @Autowired
    private RoleService roleService;

    /**
     * 权限认证
     *
     * @param principalCollection
     * @return
     */
    @Override
    protected AuthorizationInfo doGetAuthorizationInfo(PrincipalCollection principalCollection) {
        //获取登录用户名
        String name = (String) principalCollection.getPrimaryPrincipal();
        //查询用户名称
        SysUser user = userService.findByName(name);
        //添加角色和权限
        SimpleAuthorizationInfo simpleAuthorizationInfo = new SimpleAuthorizationInfo();
        simpleAuthorizationInfo.addStringPermissions(permissionService.getPermissionsByAccount(user.getAccount()));
        simpleAuthorizationInfo.addRoles(roleService.getRolesByAccount(user.getAccount()));
        return simpleAuthorizationInfo;

    }

    @Override
    protected AuthenticationInfo doGetAuthenticationInfo(AuthenticationToken authenticationToken) throws AuthenticationException {
        //加这一步的目的是在Post请求的时候会先进认证，然后在到请求
        if (authenticationToken.getPrincipal() == null) {
            return null;
        }
        //获取用户信息
        String name = authenticationToken.getPrincipal().toString();
        SysUser user = userService.findByName(name);
        if (user == null) {
            //这里返回后会报出对应异常
            return null;
        } else {
            //这里验证authenticationToken和simpleAuthenticationInfo的信息
            return new SimpleAuthenticationInfo(name, user.getPassword(), getName());
        }
    }

}
